Method of operating an internal combustion engine

US6520140B2 · kind B2 · utility

Assignees

• Daimlerchrysler AG · US
• Robert Bosch GmbH · DE

Inventors

• Stefan Dreymüller · Stuttgart, DE
• Thomas Ganser · Stuttgart, DE
• Thomas Monninger · Sunnyvale, US
• Andreas Schmidt · Braunschweig, DE

Key dates

• Filing date: May 23, 2001
• Grant date: Feb 18, 2003
• Expiry date: May 23, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D17/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a method for the operation of an internal combustion engine either on all cylinders (as full engine) or with only some cylinders in operation (cylinder cut-off), the cylinders are divided, in the firing order, into two groups of alternating cylinders which are selectively operative with an angular ignition spacing twice that of the cylinders of the engine when operating as full engine, the two groups of cylinders being activated alternately during engine operation with cylinder cut-off.